[yocto-perf] Build Perf Test Report for CentOS Linux 7 (Core)

[Yocto CentOS 7 Build Perf Tester]

Yocto build performance test report.

TEST METADATA:
==============
                      CURRENT COMMIT          COMPARING WITH      
Hostname:             ypperf-centos7          ypperf-centos7      
Branch:               master                  master              
Commit number:        51657                   51644               
Commit:               fe40065693a936102804    74feaddda3b7cd5b3ab1
Number of test runs:  1                       3                   

TEST RESULTS:
=============
  test1: Build core-image-sato
                                                               
  test12: Build virtual/kernel
           build time     8:13.2  ->  7:50.5   -22.7 s   -4.6 %
                                                               
  test13: Build core-image-sato with rm_work enabled
                                                               
  test2: Run core-image-sato do_rootfs with sstate
                                                               
  test3: Bitbake parsing (bitbake -p)
           parse_1 time   27.1 s  ->  27.2 s   +0.03 s   +0.1 %
           parse_2 time   17.1 s  ->  16.9 s   -0.16 s   -1.0 %
           parse_3 time    1.7 s  ->  1.7 s    -0.02 s   -1.0 %
                                                               
  test4: eSDK metrics
                                                               

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